#include <iostream>
#include <string>
using namespace std;

// Declare the "morse letter map"
//
// Both these "arrays" contain the same number of items
// (A string is essentially an array of characters).
// Each item in the morse array represent the item (letter)
// in the same position in the alphabet array.
//
// The reason we use this method is because we have a
// big variation of letters to translate (åäö not being
// right next to the rest of the letters. If they were
// we could have used a more optimal solution)
string alphabet ="ABCDEFGHIJKLMNOPQRSTUVWXYZåäö";
string morse[36]={".-","-...","-.-.","-..",".","..-.","--.","....","..",".---","-.-",".-..","--","-.","---",".--.","--.-",".-.","...","-","..-","...-",".--","-..-","-.--","--..",".--.-",".-.-","---.",};

// Translates a normal character to it's morse string representation.
// The function assumes the letter is already in uppercase to match our alphabet.
string morseFromLetter(char letter)
{
    // Make sure we have the uppercase version of the letter,
    // since our alphabet is in uppercase (this practically means that
    // the program will not make any difference between cases)
    char uppercaseLetter = toupper(letter);

    // Go through the alphabet and find index of the letter we want to translate.
    // We will use this index to select the correct morse representation from the morse array.
    int alphabetLength = alphabet.length();
    for(int i = 0; i < alphabetLength; i++)
    {
        // Compare the current alphabet letter to the input letter,
        // if they match we have found the correct index.
        if(alphabet[i] == uppercaseLetter)
        {
            // Select the translation from the morse
            // array and have the function return it
            return morse[i];
        }
    }

    // Reaching this point means that the letter wasn't found in the alphabet we have defined.
    // In this case we will return an empty string, since we don't know what else to return.
    return "";
}

// Translates a normal string of text
// to it's morse string representation
string morseFromText(string text, string padding = " ")
{
    // Retreive the length of the text
    int textLength = text.length();

    // This variable will get each letters translation added to it,
    // and of course we then want to start with an empty string
    string textTranslation = "";

    // Go through each letter of the text (one letter per loop)
    for(int i = 0; i < textLength; i++)
    {
        // Retreive the letter of the current loop
        char currentLetter = text[i];

        // Send currentLetter to our letter translation
        // function to get the morse representation of the letter
        string letterTranslation = morseFromLetter(currentLetter);

        // Add the translation of the current letter
        // to the full text translation variable
        textTranslation += letterTranslation;

        // Add the padding text that we want
        // to have between every morse string
        textTranslation += padding;
    }

    // Have the function return the result,
    // the text translated into morse code
    return textTranslation;
}

int main()
{
    // These are the variables we will need for the loop,
    // also it looks a lot neater to have them here.
    string input, translation;

    // Start by welcoming the user and giving
    // instructions on how to use the program
    cout << "Welcome to the morse code translator!" << endl << endl
         << "After '>', type any text you want to translate " << endl
         << "and press Enter to receive the translation. " << endl << endl
         << "To end the program simply submit 'quit'." << endl << endl
         << "Have fun!" << endl;

    // Loop until "further notice" :)
    while(true)
    {
        // Have the user input something to translate
        cout << "> ";
        cin >> input;

        // Check if the user wants to quit the program.
        if(input == "quit")
            break; // Stop looping if a quit request is detected

        // Translate what the user input into morse code
        translation = morseFromText(input);

        // Output the translation to the user
        cout << "= " << translation << endl << endl;

        // Loop again!
    }

    // Require the user to press any key
    // before finally ending the program
    system("pause");
}